What is the weather like in Mariehamn vs Oslo in September?

In September, Mariehamn averages 16°C high / 9°C low with about 54 mm of rain; Oslo averages 18°C high / 10°C low with about 93 mm.

Mariehamn vs Oslo in September

Mariehamn and Oslo are nearly tied in September — 73 vs 74 on SeasonMap's comfort score. Mariehamn is cool, a little rain, clean air; Oslo is nice, rainy, clean air.

Mariehamn vs Oslo — September climate, side by side

	Mariehamn	🇳🇴 Oslo
Comfort score	73/100 (B)	74/100 (B)
Feels-like high	14°C	16°C
Avg high / low	16° / 9°	18° / 10°
Rainfall	54 mm	93 mm
Rainy days	8	10
Humidity	79%	82%
Air quality (AQI)	38	38

Monthly climate normals (ERA5 reanalysis). Comfort scores are SeasonMap estimates.

Month by month

Mariehamn Åland Islandscool, a little rain, clean air · best July73
Oslo 🇳🇴 Norwaynice, rainy, clean air · best July74

Mariehamn vs Oslo in September — FAQ

Is September better in Mariehamn or Oslo?: Mariehamn and Oslo are nearly tied in September — 73 vs 74 on SeasonMap's comfort score. Mariehamn is cool, a little rain, clean air; Oslo is nice, rainy, clean air.
What is the weather like in Mariehamn vs Oslo in September?: In September, Mariehamn averages 16°C high / 9°C low with about 54 mm of rain; Oslo averages 18°C high / 10°C low with about 93 mm.